Angle-cock



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W. J. WALDRON. ANGLE 000K.

WITNESSES: INVENTOR A TTORNE Y S;

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UNITED STATES PATENT @FFICE.

WILLIAM J. WALDRON, OF FORT WORTH, TEXAS.

ANGLE-COCK.

SPECIFICATION forming part of Letters Patent No. 536,053, dated March 19, 1895.

Application fi d December 10, 1894. Serial No. 531,407- (No model.)

To aZZ whom it may concern:

Be it known that I, WILLIAM JOSEPH WAL- DRON, of Fort forth, in the county of Tarrant and Stateof Texas, have invented anew and Improved Angle-Cock, of which the following is a full, clear, and exact description.

The invention relates to fluid pressure air brakes, and its object is to provide a new and improved angle cock arranged in such a manner that the plug cannot be turned byunauthorized persons and without the knowledge of the engineer in charge of the train.

The invention consists in a locking device for the train pipe valve or plug, and a connection separate from the train pipe and under the control of the engineer, to manipulate the said locking device and secure the valve or plug in position.

The invention also consists in certain parts and details and combinations of the same, as will be hereinafter fully described and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in whichsimilar letters of reference indicate 7 corresponding parts in all the views.

Figure 1 is a side elevation of the improvement, with parts in section. tional plan view of the same, on the line 22 of Fig. 1, and Fig. 3 is an inverted plan view of the piston casing.

The improved. angle cock is provided with the usual casing or body A, connected at one end with the train pipe B, and atits forward end with the hose 0 adapted to be coupled to the hose of the adjacent cock. In the body A is mounted to turn the usual valve or plug D, for establishing connection between the train pipe and the hose, or cutting off communication between the two, according to the open or closed position of the said plug D. The latter is provided on its small end with a square offset D, which engages a square openin gE in thebase end of the handle E adapted to be taken hold of by the trainman, to turn the said plug D and open or close the same, as previously described. The upper portion of the opening E is adapted tobe engaged by the square end F of a piston rod F, of a pis ton G fitted to slide in a cylinder H, bolted or otherwise fastenedon the casing or body A, the bottom of the said cylinder beingformed Fig. 2 is a secwith a square opening H, for the passage of the said square oifset F, to guide the latter and to prevent turning of the piston rod F and its piston G. A spring I is coiled on the piston rod F, and is seated at one end on the bottom of the cylinder H, while its other end presses against the piston G, so as to hold the latter normally in an uppermost position, that is, with the lower end of the square offset F out of engagement with the square opening E of the handle E. v

The upper end of the cylinder H is connected by pipes J with air under pressure, by connecting the said pipes with the main reservoir of the engine, or the whistle signal line, or a separate independent line, so that air under pressure and under the control of the engineer, can pass into the upper end of the cylinder, and force the piston G downward to compress the spring I, and to engage the square offset F withthe square opening E in the handle E, to prevent the latter from turning, and consequently" to prevent the plug D from being shifted from an open position to a closed position. Thus as long as fluid under pressure passes into the upper end of the cylinder H, the position of the plug D cannot be changed, and as the said fluid under pressure is under the control of the engineer in charge of the train, the angle cock cannot be tampered with by unauthorized persons. As soon as the pressure in the upper end of the cylinder H is released, then the spring I causes an upward sliding of the piston G, to withdraw the square end F from the square opening E in the handle E, and permit the trainman to move the handle E to close the plug D if de sired.

I am aware that supplemental fluid pressure pipes and locking devices have been em ployed on coupling heads to hold the sliding train pipe valve open as soon as the coupling is efiected between adjacent cars and the valve is moved off its seat, the locking devices automatically releasing the train pipe valve to permit the latter to seat itself in case of an accidental separation of the cars.

It is expressly understood that in my invention the locking device is of an essentially different nature and altogether for a different purpose and only applied on the manually operated angle cock to lock the plug thereof to prevent tampering therewith by unauthorized persons; no movement of the plug or valve being necessary to effect a locking thereof as is the case in coupling heads such as above referred to.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A train pipe angle cock, having themanually operated plug and provided with a locking device for the said plug, and a fluid pressure connection separate from the train pipe and under the control of the engineer to actuate the said locking device and secure the plug in position and without previous movement of the plug, substantially as shown and described.

2. A train pipe anglecock havingthe manually operated plug a cylinder held in the angle cock casing and connected at one end with fluid pressure under the control of the engineer and separate from the train pipe, a spring pressed piston fitted to slide in the said cylinder and a piston rod adapted to engage the manually operated angle cock plug to lock the latter in position Without previous movement of the said plug, substantially as shown and described.

3. An angle cock, comprising a body, a valve or plug mounted to turn therein, a handle for engaging the said valve or plug to turn the latter, and a fluid controlled and springpressed piston, having a polygonal offset on its rod which fits and slides in an opening of corresponding form, and engages the said handie, to prevent the latter from turning, sub stantially as shown and described.

YVILLIAM J. \VALD RON.

\Vitnesses:

JOHN HURLEY, AUG. KELLER. 

